What is "oxidoreductase"

n. (context enzyme English) Any enzyme that catalyzes an oxidation-reduction (redox) reaction.

n. an enzyme that catalyzes oxidation-reduction

In biochemistry, an oxidoreductase is an enzyme that catalyzes the transfer of electrons from one molecule, the reductant, also called the electron donor, to another, the oxidant, also called the electron acceptor. This group of enzymes usually utilizes NADP or NAD+ as cofactors.